CN114859570B - Self-adaptive vision lens, self-adaptive vision glasses and design method - Google Patents
Self-adaptive vision lens, self-adaptive vision glasses and design method Download PDFInfo
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- 230000004438 eyesight Effects 0.000 title claims abstract description 121
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- 238000013461 design Methods 0.000 title abstract description 10
- 239000000758 substrate Substances 0.000 claims abstract description 27
- 230000003044 adaptive effect Effects 0.000 claims description 87
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- 238000005315 distribution function Methods 0.000 claims description 6
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- 208000001491 myopia Diseases 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000004379 myopia Effects 0.000 abstract description 6
- 206010020675 Hypermetropia Diseases 0.000 abstract description 4
- 230000004305 hyperopia Effects 0.000 abstract description 4
- 201000006318 hyperopia Diseases 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 9
- 210000004556 brain Anatomy 0.000 description 8
- 238000012937 correction Methods 0.000 description 4
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/022—Ophthalmic lenses having special refractive features achieved by special materials or material structures
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive
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- Ophthalmology & Optometry (AREA)
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- Eyeglasses (AREA)
Abstract
The invention provides a self-adaptive vision lens, self-adaptive vision glasses and a design method, wherein the self-adaptive vision lens comprises the following components: a transparent substrate and a plurality of superlens units; each super lens unit corresponds to a focal length, and the number of the super lens units corresponding to each super lens unit is multiple; a plurality of the superlens units are disposed on at least one side of the transparent substrate. According to the self-adaptive vision lens, the self-adaptive vision glasses and the design method provided by the embodiment of the invention, the requirements of people with different degrees (including myopia and hyperopia) can be met without the processes of optometry, lens customization and the like, and the self-adaptive vision lens, the self-adaptive vision glasses and the design method have universality; and the super lens unit has the advantages of simple structure, light weight, low cost and the like, is convenient for users to wear, and is suitable for mass production.
Description
Technical Field
The invention relates to the technical field of glasses, in particular to a self-adaptive vision lens, a self-adaptive vision glasses and a design method.
Background
At present, the degree of the glasses is certain, different users need to customize according to the degree of the glasses, and complicated optometry and customization processes are needed, so that the glasses are not suitable for low-cost, universal and mass production.
In order to enable one pair of spectacles to be adapted to users of different powers, an adaptive pair of vision spectacles is currently available. The lenses of the self-adaptive vision glasses are provided with a plurality of microlenses with different degrees, and a user can see things in front of eyes by utilizing the brain nourishing capability and vision retention of the human brain. Microlenses add thickness and weight to such adaptive vision lenses, resulting in heavy lenses.
Disclosure of Invention
In order to solve the above problems, an objective of an embodiment of the present invention is to provide an adaptive vision lens, an adaptive vision glasses and a design method.
In a first aspect, embodiments of the present invention provide an adaptive vision lens comprising: a transparent substrate and a plurality of superlens units;
each super lens unit corresponds to a focal length, and the number of the super lens units corresponding to each super lens unit is multiple;
A plurality of the superlens units are disposed on at least one side of the transparent substrate.
In one possible implementation, the aperture of any one of the superlens units is not greater than a maximum aperture, the maximum aperture being determined based on the superlens unit having the smallest focal length without chromatic aberration.
In one possible implementation, the maximum caliber satisfies:
wherein d max represents the maximum caliber, Δn eff represents the equivalent refractive index interval corresponding to the superlens unit, h represents the height of the nanostructure in the superlens unit, and f min represents the minimum focal length.
In one possible implementation, a plurality of the superlens units are disposed in a close stack on at least one side of the transparent substrate.
In one possible implementation, the superlens unit is square, hexagonal or sector-shaped in shape.
In one possible implementation, the nanostructures in the superlens unit are polarization-independent structures.
In one possible implementation, the nanostructure includes: at least one of a nano column structure, a hollow nano column structure, a nano hole structure, a nano ring hole structure, a nano square column structure, a square nano hole structure, a nano square ring structure and a nano square ring hole structure.
In one possible implementation, the nanostructures in the superlens unit are arranged in a hexagonal array, and the nanostructures are located at a central position and/or a vertex position of the hexagonal array.
In one possible implementation, the reciprocal of the focal length of the plurality of superlens units is in an arithmetic progression.
In one possible implementation manner, a plurality of the superlens units corresponding to each of the superlens units are distributed in a ring shape;
The distance from the superlens unit to the center of the adaptive vision lens is in positive correlation with the absolute value of the focal length of the superlens unit.
In one possible implementation, each of the superlens units is disposed on at least one side of the transparent substrate in a randomly distributed manner.
In one possible implementation, the random distribution includes an equiprobable random distribution having a focal length of the superlens unit as a random variable;
or the random distribution comprises: and the unequal probability random distribution taking the focal length or the power of the superlens unit as a random variable is convex random distribution.
In a second aspect, an embodiment of the present invention further provides a method for designing an adaptive vision lens as described above, including:
Determining the category number N of the super lens units according to the maximum power D max and the minimum power D min corresponding to the super lens units and the power intervals delta D of the super lens units of different types;
Determining the total number M of the superlens units according to the size of the adaptive vision lens and the size of the single superlens unit, and sequentially setting numbers i, i=1, 2, … and M for the superlens units at different positions;
And determining the power of the superlens unit with the number i according to a probability distribution function corresponding to the random distribution.
In a third aspect, embodiments of the present invention further provide an adaptive vision glasses, including: a frame and any of the adaptive vision lenses described above.
According to the scheme provided by the embodiment of the invention, the super lens units with different focal lengths are paved on the self-adaptive vision lens, so that different correcting effects can be realized on light transmitted through the self-adaptive vision lens, and when a user uses the self-adaptive vision lens, the eyes of the user can automatically find clear positions by utilizing the brain compensation capability and the vision retention effect of the brain of the user, so that the user with different degrees can clearly see things in front of eyes through the self-adaptive vision lens. The self-adaptive vision lens does not need to undergo the processes of optometry, lens customization and the like, can meet the requirements of people with different degrees (including myopia and hyperopia), and has universality; and the super lens unit has the advantages of simple structure, light weight, low cost and the like, is convenient for users to wear, and is suitable for mass production.
In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of an adaptive vision lens according to an embodiment of the present invention;
FIG. 2 is a schematic diagram showing the arrangement of nanostructures in a superlens unit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a first structure of adaptive vision glasses according to an embodiment of the present invention;
FIG. 4 is a schematic diagram showing a second configuration of adaptive vision glasses according to an embodiment of the present invention;
FIG. 5 is a schematic view of a third configuration of adaptive vision glasses according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a fourth configuration of adaptive vision glasses according to an embodiment of the present invention;
FIG. 7 is a schematic view of a fifth configuration of adaptive vision glasses according to an embodiment of the present invention;
fig. 8 is a flow chart illustrating a method for designing adaptive vision glasses according to an embodiment of the present invention.
Icon:
1-adaptive vision lens, 2-mirror frame, 10-transparent substrate, 20-superlens unit and 201-nano structure.
Detailed Description
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The embodiment of the invention provides a self-adaptive vision lens which can be suitable for people with different degrees. Referring to fig. 1, the adaptive vision lens includes: a transparent substrate 10 and a variety of superlens units 20. Wherein, each superlens unit 20 corresponds to a focal length, and the number of superlens units corresponding to each superlens unit 20 is plural; a plurality of superlens units 20 are disposed on at least one side of the transparent substrate 10; as shown in fig. 1, a plurality of superlens units 20 are disposed on the upper side of a transparent substrate 10.
In the embodiment of the present invention, a plurality of superlens units 20 are disposed on at least one side of the transparent substrate 10 to form a lens capable of self-adapting vision. The transparent substrate 10 is at least transparent to visible light, and may be glass, silicon oxide, or the like. The shape of the transparent substrate 10 is the shape of the adaptive vision lens, which may be circular, square, etc., or the adaptive vision lens provided in this embodiment can be directly used for making glasses without the processes of polishing, etc., so that the shape of the transparent substrate 10 may also be matched with the frame of the glasses, and the shape of the transparent substrate 10 is not limited in this embodiment.
The superlens units 20 are divided into a plurality of types, and each superlens unit 20 corresponds to one focal length, namely the focal length and the lens power are in one-to-one correspondence; since the power of the lens is equal to the reciprocal of its focal length (in meters) multiplied by 100, each superlens unit 20 also corresponds to one power. Wherein it is possible to determine which focal lengths of the superlens unit 20 are needed based on the current requirements. For example, if the adaptive vision lens requires 100 degrees, 200 degrees, and 300 degrees of superlens units 20, three types of superlens units 20 are required, and each superlens unit 20 has a focal length of 1000mm, 500mm, and 250mm in order. Alternatively, the inverse of the focal length (e.g., number of diopters, diopters) of the plurality of superlens units 20 is in an arithmetic progression.
The adaptive vision lens utilizes a plurality of superlens units 20 of different powers to achieve adaptive vision. Specifically, the number of superlens units corresponding to each superlens unit 20 is plural, that is, each superlens unit 20 includes plural superlens units 20, and the sum of the numbers of superlens units corresponding to all types of superlens units 20 is the total number M of all superlens units included in the adaptive vision lens. All the superlens units 20 are disposed at one side of the transparent substrate. For example, the superlens units 20 do not overlap each other. Alternatively, in order to enhance the vision correction effect of the adaptive vision lens, a plurality of superlens units 20 are disposed in close-packed form on at least one side of the transparent substrate 10. For example, the superlens unit 20 may have a square, hexagonal, or sector-ring shape to enable close-packed arrangement. Fig. 1 illustrates the superlens unit 20 as a hexagon.
The adaptive vision lens provided by the embodiment of the invention is paved with the superlens units 20 with different focal lengths, so that different correction effects can be realized on the light transmitted through the adaptive vision lens, and when a user uses the adaptive vision lens, the eyes of the user can automatically find clear positions by utilizing the brain compensation capability and the vision retention effect of the brain of the user, so that the user with different degrees can clearly see things in front of the eyes through the adaptive vision lens. The self-adaptive vision lens does not need to undergo the processes of optometry, lens customization and the like, can meet the requirements of people with different degrees (including myopia and hyperopia), and has universality; in addition, the superlens unit 20 has the advantages of simple structure, light weight, low cost and the like, is convenient for users to wear, and is suitable for mass production.
Similar to a diffraction lens, the superlens has a larger chromatic aberration (compared to a refractive lens), so that chromatic aberration of the superlens unit 20 used in the adaptive vision lens needs to be corrected. In the embodiment of the present invention, the maximum caliber of the superlens unit 20 without chromatic aberration is determined based on the superlens unit 20 with the minimum focal length, and the caliber of any superlens unit 20 is not greater than the maximum caliber, so that the caliber of the superlens unit 20 is as large as possible, no chromatic aberration (no chromatic aberration focusing is possible), and a clearer image quality can be obtained. Wherein the aperture of the superlens unit 20 refers to the outer peripheral dimension of the superlens unit 20; for example, if the superlens unit 20 is circular, the aperture may be a diameter, and if the superlens unit 20 is square, hexagonal, or the like, the aperture may be a diameter of an circumscribed circle of the superlens unit 20.
Alternatively, the superlens unit 20 may comprise a plurality of nanostructures arranged periodically, and the appropriate nanostructure may be selected from the library of achromatic differences to design the superlens unit 20. In the case where the superlens unit 20 has no chromatic aberration, the relationship between the equivalent refractive index interval Δn eff (the difference between the maximum equivalent refractive index and the minimum equivalent refractive index of the nanostructure in the chromatic aberration library) corresponding to the superlens unit 20 and the maximum value d m of the caliber d of the superlens unit 20 satisfies the following formula (1), that is, when the caliber of the superlens unit 20 is smaller than the maximum value d m, the superlens unit 20 can correct chromatic aberration.
Where h denotes the height of the nanostructures 201 in the superlens unit 20 and f denotes the focal length of the superlens unit 20.
After the achromatic color difference library is determined, the equivalent refractive index interval delta n eff is a fixed value; as is clear from the above equation (1), the smaller the focal length f of the superlens unit 20 is, the smaller the maximum value d m of the aperture thereof is. Because the adaptive vision lens includes the superlens units 20 with different focal lengths, if each adaptive vision lens uses a larger aperture according to the respective standard, the superlens units 20 with different sizes are difficult to arrange, for example, close-packed arrangement is difficult to achieve, and the use effect is affected. The maximum caliber which cannot be exceeded by all the superlens units 20 is set in this embodiment, so that the caliber of all the superlens units 20 is as large as possible, and the superlens units 20 can be unified in size, so that arrangement is convenient, for example, close-packed arrangement is convenient.
Specifically, the present embodiment takes the maximum value d m of the aperture of the superlens unit 20 having the minimum focal length f min as the maximum aperture d max required for the adaptive vision lens. As obtained by the above formula (1), the maximum caliber d max satisfies:
Where d max denotes a maximum caliber, Δn eff denotes an equivalent refractive index section corresponding to the superlens unit 20, h denotes a height of the nanostructure 201 in the superlens unit 20, and f min denotes a minimum focal length.
For example, the adaptive vision lens is applicable in a power range of 200-400 degrees, and the adaptive vision lens includes five types of superlens units 20, and the five types of superlens units correspond to 200 degrees, 250 degrees, 300 degrees, 350 degrees, 400 degrees, respectively, the superlens unit 20 with the minimum focal length is the superlens unit 20 corresponding to 400 degrees, and the minimum focal length f min =250 mm. If the equivalent refractive index interval Δn eff =0.65, the height of the nanostructure is 1200nm, which is obtainable based on the above formula (2), the maximum caliber d max =1.25 mm, i.e. the caliber of each superlens unit 20 is not more than 1.25mm. For example, all superlens units 20 have the same caliber and are all 1.25mm.
Alternatively, the nanostructures 201 in the superlens unit 20 employ polarization independent structures, as the adaptive vision lens is primarily intended to transmit natural light. For example, the nanostructure 201 includes: at least one of a nano column structure, a hollow nano column structure, a nano hole structure, a nano ring hole structure, a nano square column structure, a square nano hole structure, a nano square ring structure and a nano square ring hole structure. By means of nanostructures of different structural types and duty cycles, the dispersion can be adjusted.
The nanostructure may be an all-dielectric structural unit with high transmittance in the visible band, with optional materials including: titanium oxide, silicon nitride, fused silica, aluminum oxide, gallium nitride, gallium phosphide, hydrogenated amorphous silicon, and the like. Wherein the nano structures are arranged in an array. Since the superlens unit 20 includes a plurality of nanostructures 201, in order to reduce the number of nanostructures and reduce the cost, the nanostructures 201 in the superlens unit 20 are arranged in a hexagonal array, and the nanostructures 201 are located at the center and/or the vertex of the hexagonal array, as shown in fig. 2. Fig. 2 illustrates a hexagonal array with nanostructures 201 at the center and at all the vertices.
Alternatively, the plurality of superlens units 20 may be regularly arranged on at least one side of the transparent substrate 10. As shown in fig. 3 to 5, a plurality of superlens units 20 corresponding to each superlens unit 20 are distributed in a ring shape; and, the distance from the superlens unit 20 to the center of the adaptive vision lens has a positive correlation with the absolute value of the focal length of the superlens unit 20.
In the embodiment of the present invention, each of the superlens units 20 is arranged in a ring shape, and the plurality of superlens units 20 form an arrangement structure of a ring. As shown in fig. 3 and 4, the superlens units 20 corresponding to the same annular dashed line are the same superlens units 20, i.e., the superlens units 20 corresponding to the annular dashed line have the same focal length and correspond to the same power. As shown in fig. 5, the superlens units 20 have a fan-ring shape, and the same superlens units 20 may have a ring-like structure to realize a ring-like distribution.
And, the center of the annular distribution is the center of the adaptive vision lens, and the distance from the superlens unit 20 to the center of the adaptive vision lens has a positive correlation with the absolute value of the focal length of the superlens unit 20, that is, the closer the superlens unit 20 is to the center of the adaptive vision lens, the smaller the focal length of the superlens unit 20 (the larger the absolute value of the power); in other words, the superlens units 20 in the adaptive vision lens are arranged in such a manner that the power decreases from the center to the outside. Wherein, when the adaptive vision lens is a hyperopic lens, the superlens unit 20 is similar to a convex lens, its focal length is positive, and the power is also positive; when the adaptive vision lens is a near vision lens, the superlens unit 20 is similar to a concave lens in that its focal length is negative and its power is also negative.
For example, referring to fig. 3, the superlens unit 20 is in a regular hexagonal structure, and a plurality of regular hexagonal superlens units 20 can be closely packed on the lens base 10 of the adaptive vision lens with power decreasing from the center of the lens outward in a d-degree interval and a r i -radius interval along the radius. If Δd is 25 degrees, as shown in fig. 3, the center power is-500 degrees (myopia), the radius of the superlens unit 20 is 2mm, the first turn power is-475 degrees, the radius is 3mm (Δr 1 =1 mm), the second turn power is-450 degrees, the radius is 4mm (Δr 2 =1 mm), the third turn power is-425 degrees, the radius is 6mm (Δr 3 =2 mm), and so on. The schematic diagram of the processing structure of the single superlens unit 20 is shown in the enlarged schematic diagram of the lower right in fig. 3, and in the single superlens unit 20, a plurality of nanostructures 201 having the same structure are also distributed in a ring shape, so as to form the superlens unit 20 having a desired power. Wherein the nanostructures 201 of the same structure are capable of modulating the same phase, the different phases modulated by the nanostructures 201 are represented in different gray scales in the enlarged schematic diagram of fig. 3 at the bottom right.
For example, referring to fig. 4, the superlens unit 20 is of a square configuration, and a plurality of square superlens units 20 can be closely packed on the lens base 10 of the adaptive vision lens with power decreasing radially outwardly from the center of the lens at Δd power intervals, Δr i radial intervals. If Δd is 10 degrees, as shown in fig. 4, the central power is 500 degrees (far vision), the radius of the superlens unit 20 is 2mm, the first turn power is 490 degrees, the radius is 3.5mm (Δr 1 =1.5 mm), the second turn power is 480 degrees, the radius is 4.5mm (Δr 2 =1 mm), the third turn power is 470 degrees, the radius is 6mm (Δr 3 =1.5 mm), and so on. The schematic of the processing structure of the single superlens unit 20 is shown in the enlarged schematic of the lower right in fig. 4. If all the superlens units 20 have the same structure, the radial intervals Δr i are the same or have a multiple relationship.
For example, referring to fig. 5, the superlens unit 20 has a fanned annular structure, and a plurality of fanned annular superlens units 20 can be closely packed on the lens base 10 of the adaptive vision lens with power decreasing from the center of the lens radially outwardly at Δd power intervals, Δr i radial intervals. If Δd is 5 degrees, as shown in fig. 5, the center power is-500 degrees (myopia), the radius of the superlens unit 20 is 2mm (the superlens unit 20 at the center position is illustrated as a circle), the first circle power is-495 degrees, the radius is 3mm (Δr 1 =1 mm), the second circle power is-490 degrees, the radius is 4mm (Δr 2 =1 mm), the third circle power is-485 degrees, the radius is 5mm (Δr 3 =1 mm), and so on. A schematic diagram of the processing structure of the single superlens unit 20 is shown in an enlarged schematic diagram of the lower right in fig. 5.
Or alternatively, a plurality of superlens units 20 may be randomly arranged on at least one side of the transparent substrate 10. As shown in fig. 6 and 7, each superlens unit 20 is disposed at one side of the transparent substrate 10 in a random distribution manner. In fig. 6 and 7, reference numeral ①、②、③、④ denotes one type of superlens unit 20, that is, all superlens units ① have one focal length, all superlens units ② have another focal length … …, and so on, respectively.
Alternatively, the random distribution includes an equiprobable random distribution having the focal length of the superlens unit 20 as a random variable. That is, the probability of which superlens unit 20 to use is the same at any position of the adaptive vision lens. For example, the number of superlens units 20 included in each type of superlens unit 20 is the same, and all the superlens units 20 are randomly distributed on one side of the transparent substrate 10. For example, the adaptive vision lens needs 10 kinds of superlens units 20 with different focal lengths, and the total number of the superlens units 20 is 1000, 100 superlens units 20 can be selected for each kind, and the adaptive vision lens is generated by setting in a random arrangement mode.
Or the random distribution includes: the unequal probability random distribution having the focal length or power of the superlens unit 20 as a random variable is a convex random distribution.
In the embodiment of the present invention, the distribution probability of the superlens units 20 of different kinds is different, for example, the number of superlens units 20 of different kinds may be different. The adaptive vision lens provided by the embodiment of the invention can be suitable for users in a certain power range, the specific numerical value of the power range is related to the focal length of the superlens unit 20 selected by the adaptive vision lens, and when the users select the adaptive vision lenses in different power ranges, the adaptive vision lens with the middle value matched with the power of the user can be more easily selected. For example, the power of the adaptive vision lens ranges from 200 degrees to 400 degrees, and the adaptive vision lens is more easily used by users having a power of 300 degrees. In order to improve the vision correction effect on the user, the non-equal probability according to which the superlens unit 20 is arranged is a convex random distribution, which is a distribution with high middle and low both sides, i.e., a focal length or power in the middle has a higher probability. For example, the non-equal probability random distribution may be specifically a gaussian distribution, a poisson distribution, or the like.
The random variable of the non-equiprobable random distribution may be a focal length or a power, and in general, the non-equiprobable random distribution of all the superlens units 20 may be realized by using the power as a random variable.
The adaptive vision lens provided by the embodiment of the invention is paved with the superlens units 20 with different focal lengths, so that different correction effects can be realized on the light transmitted through the adaptive vision lens, and when a user uses the adaptive vision lens, the eyes of the user can automatically find clear positions by utilizing the brain compensation capability and the vision retention effect of the brain of the user, so that the user with different degrees can clearly see things in front of the eyes through the adaptive vision lens. The self-adaptive vision lens does not need to undergo the processes of optometry, lens customization and the like, can meet the requirements of people with different degrees (including myopia and hyperopia), and has universality; in addition, the superlens unit 20 has the advantages of simple structure, light weight, low cost and the like, is convenient for users to wear, and is suitable for mass production. The maximum caliber is determined based on the superlens units 20 with the minimum focal length, and the calibers of all the superlens units 20 are constrained to be not larger than the maximum caliber, so that the calibers of all the superlens units 20 can be as large as possible under the condition of ensuring no chromatic aberration, and clearer image quality can be obtained; in addition, the size of the superlens unit 20 can be unified, and close packing arrangement is convenient to realize. All the superlens units 20 are distributed in a random distribution manner, so that the human eyes can automatically find clear positions, and the lens is more suitable for people with different degrees.
In the case of random distribution of the superlens units 20, the number of each superlens unit 20 may be determined based on a probability distribution function corresponding to the random distribution, and then all the superlens units 20 may be randomly arranged. But this approach is suitable for the case of separately manufacturing the superlens unit 20. In the adaptive vision lens provided by the embodiment of the invention, various superlens units 20 are arranged on one side of the transparent substrate 10, so that the required nano structure can be directly generated and etched on one side of the transparent substrate 10, thereby forming various superlens units 20. In the case of a random distribution of superlens units 20, embodiments of the present invention also provide a design method for designing an adaptive vision lens for the random distribution, as shown in fig. 8, the method comprising:
Step 801: the number of types N of the superlens units 20 is determined according to the maximum power D max, the minimum power D min, and the power intervals Δd of the superlens units 20 of different types, which correspond to the superlens units 20.
In embodiments of the present invention, the maximum power D max and the minimum power D min of the superlens unit 20 therein may be determined according to the power range required for the adaptive vision lens. In general, the power interval Δd of the different types of superlens units 20 may be determined autonomously, so that the number N of types of superlens units 20 required for the adaptive vision lens may be determined based on this. For example, the power range of the adaptive vision lens currently required to be designed is 200-400 degrees, the maximum power D max =400 and the minimum power D min =200, and if the power interval Δd=20, n= (400-200)/20+1=11 types of superlens units 20 are required in total.
Step 802: the total number M of superlens units 20 is determined according to the size of the adaptive vision lens and the size of the individual superlens units 20, and the superlens units 20 at different positions are sequentially provided with numbers i, i=1, 2, …, M.
In the present embodiment, the total area of all superlens units 20 does not exceed the total area of the adaptive vision lens; if the superlens units 20 are in a close-packed arrangement, they may be identical; thus, the total number M of superlens units 20 required for the adaptive vision lens can be determined based on the multiple relationship between the two. For example, the length of the adaptive vision lens is 40mm, the width is 20mm, and if the superlens unit 20 is a square structure with a side length of 1mm, the adaptive vision lens needs 40×20/1=800 superlens units 20 in total, i.e., m=800; the 800 superlens units 20 should be sequentially arranged at the corresponding positions of the adaptive vision lens, and different numbers are sequentially set for the superlens units 20 at each position in this embodiment. For example, numbered 1, 2, 3, …,800 in order from left to right and from top to bottom according to the position of the superlens unit 20.
Wherein the size of the single superlens unit 20 may be determined by the maximum aperture d max of the chromatic aberration correcting superlens.
Step 803: the power of the superlens unit 20 of the number i is determined according to a probability distribution function corresponding to the random distribution.
In the embodiment of the invention, each number i corresponds to a different position. For the superlens unit 20 at the number i, which superlens unit 20 needs to be used at the number i is selected according to a probability distribution function of random distribution. By selecting the superlens units 20 at all positions in this way, the focal length of the superlens unit 20 at each position of the adaptive vision lens can be finally designed, and the adaptive vision lens can be manufactured.
As shown in fig. 6 and 7, the number ①～⑩ represents 10 different powers (different focal lengths) of the superlens unit 20, and the types of the superlens unit 20 at each position determined according to the design method of the above steps 801 to 803 are specifically shown. Taking the example shown in fig. 7, for the superlens unit 20 at the upper left corner position, the probability of which superlens unit 20 of ①～⑩ is selected to conform to the probability distribution function; for example, if the random distribution is an equiprobable random distribution, the probability of which superlens unit is selected at the upper left corner position is the same; if the random distribution is a non-equal probability random distribution, the probability of selecting a superlens unit 20 of intermediate focal length or intermediate power at the upper left corner position is greater. Fig. 7 illustrates the superlens unit 20 at the upper left corner position with the superlens unit ⑥ selected.
Based on the same inventive concept, the embodiment of the present invention further provides an adaptive vision glasses, as shown in fig. 3 to 7, including: a frame 2 and an adaptive vision lens 1 as provided in any one of the embodiments above.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art can easily think about variations or alternatives within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (11)
1. An adaptive vision lens, comprising: a transparent substrate (10) and a plurality of superlens units (20) of different powers;
each super lens unit (20) corresponds to a focal length, and the number of the super lens units corresponding to each super lens unit (20) is a plurality;
a plurality of the superlens units (20) are disposed on at least one side of the transparent substrate (10);
a plurality of super lens units (20) corresponding to each super lens unit (20) are arranged on at least one side of the transparent substrate (10) in a random distribution mode;
the random distribution includes: non-equiprobable random distribution using focal length or power of the superlens unit (20) as random variable, wherein the non-equiprobable random distribution is convex random distribution;
The self-adaptive vision lens utilizes the vision stay effect of the user, and the eyes of the user can automatically find clear positions, so that users with different degrees can clearly see things in front of the eyes through the self-adaptive vision lens.
2. The adaptive vision lens according to claim 1, characterized in that the aperture of any of the superlens units (20) is not larger than a maximum aperture, the maximum aperture being determined based on the superlens unit (20) having the smallest focal length without chromatic aberration.
3. The adaptive vision lens of claim 2, wherein the maximum aperture satisfies:
Wherein d max represents the maximum caliber, Δn eff represents an equivalent refractive index section corresponding to the superlens unit (20), h represents a height of the nanostructure (201) in the superlens unit (20), and f min represents the minimum focal length.
4. The adaptive vision lens according to claim 1, characterized in that a plurality of the superlens units (20) are arranged in close-packed form on at least one side of the transparent substrate (10).
5. The adaptive vision lens according to claim 4, characterized in that the superlens unit (20) is square, hexagonal or sector-shaped.
6. The adaptive vision lens according to claim 1, characterized in that the nanostructures (201) in the superlens unit (20) are polarization independent structures.
7. The adaptive vision lens of claim 6, wherein the nanostructures (201) comprise: at least one of a nano column structure, a hollow nano column structure, a nano hole structure, a nano ring hole structure, a nano square column structure, a square nano hole structure, a nano square ring structure and a nano square ring hole structure.
8. The adaptive vision lens according to claim 1, characterized in that the nanostructures (201) in the superlens unit (20) are arranged in a hexagonal array, and the nanostructures (201) are located at the central and/or vertex positions of the hexagonal array.
9. The adaptive vision lens of claim 1, wherein the reciprocal of the focal length of a plurality of the superlens units (20) is in an arithmetic progression.
10.A method of designing an adaptive vision lens as defined in claim 1, comprising:
Determining the type number N of the super lens units (20) according to the maximum power D max and the minimum power D min corresponding to the super lens units (20) and the power intervals delta D of the super lens units (20) of different types;
Determining the total number M of the superlens units (20) according to the size of the adaptive vision lens and the size of the single superlens unit (20), and sequentially setting numbers i, i=1, 2, …, M for the superlens units (20) at different positions;
The power of the superlens unit (20) of the number i is determined according to a probability distribution function corresponding to the random distribution.
11. An adaptive vision eyeglass, comprising: frame (2) and adaptive vision lens (1) according to any one of claims 1 to 9.
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